Migration mechanism of <110> tilt boundaries in nickel
نویسندگان
چکیده
منابع مشابه
ATOMISTIC SIMULATIONS OF [100], [110] AND [111] SYMMETRIC TILT GRAIN BOUNDARIES IN Ni3Al
The embedded atom type otentials and static relaxation method combined with the steepest descent computational technfque have been used to simulate the grain boundary atomic structures, grain boundary energies, grain boundary cohesive energies, the distribution of electron density and stress field in the rain boundar re ion, the formation energies of vacancies and other related problems of [IOO...
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From the viewpoint of grain boundary structure a small-angle symmetric tilt boundary can be considered a boundary that is symmetrically mis-oriented by a small angle from a perfect Σ=1 boundary. The misoriention in these boundaries occurs during the re-crystallization period when annealing of the deformed material helps to develop the boundary. The development of the boundary occurs mainly by t...
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A theoretical model is suggested, which describes a decay of low-angle grain boundaries in deformed nanocrystalline materials (NCMs). In the framework of the model, lattice dislocations that form a low-angle boundary are under the action of the forces owing to external (applied) and internal stresses. The balance of the forces causes the critical shear stress at which a low-angle boundary decay...
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The chemomechanical degradation of metals by hydrogen is widely observed, but not clearly understood at the atomic scale. Here we report an atomistic study of hydrogen embrittlement of grain boundaries in nickel. All the possible interstitial hydrogen sites at a given grain boundary are identified by a powerful geometrical approach of division of grain boundary via polyhedral packing units of a...
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ژورنال
عنوان ژورنال: Letters on Materials
سال: 2020
ISSN: 2218-5046,2410-3535
DOI: 10.22226/2410-3535-2020-4-543-546